A Comparison of Dilute Aqueous Isethionic Acid and Sulfuric Acid in Hydrolysis of Three Different Untreated Lignocellulosic Biomass Varieties
A Comparison of Dilute Aqueous Isethionic Acid and Sulfuric Acid in Hydrolysis of Three Different Untreated Lignocellulosic Biomass Varieties
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DOI：
10.1021/acs.iecr.3c02314
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发表时间：
2023-11
影响因子：
4.2
通讯作者：
A. Amarasekara;V. C. Nwankwo
中科院分区：
文献类型：
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作者：
A. Amarasekara;V. C. Nwankwo
有效催化水解木质纤维素生物质为糖是生产可持续生物燃料和化学原料的主要挑战。本研究比较了异硫酸与H2SO4对玉米秸秆、柳枝稷和杨树多糖的水解作用。以0.050 mol H+/L异硫酸和H2SO4为溶剂，在90 ~ 190℃的水中，通过分析总还原糖（TRS）和葡萄糖产率来比较不同酸的催化活性。与使用H2SO4相比，使用异硫酸催化剂使玉米秸秆、柳条草和杨树的最高TRS产率温度分别降低了25%、24%和21%。葡萄糖的产率也有类似的效果。这种温度的降低是由于多糖解聚反应的活化能降低，很可能是由于生物质多糖中异硫酸- OH基团和- OH基团之间的氢键型偶极相互作用。
Efficient catalytic hydrolysis of lignocellulosic biomass to sugars is a major challenge in the production of sustainable biofuels and chemical feedstocks. In this study isethionic acid was compared with H2SO4 for hydrolysis of polysaccharides in corn stover, switch grass, and poplar. The catalytic activities of acids were compared by analysis of total reducing sugar (TRS) and glucose yields in a sequence of experiments in water at 90–190 °C using 0.050 mol of H+/L isethionic acid and H2SO4. In comparison to using H2SO4, the use of isethionic acid catalyst lowered the maximum TRS percent yield temperatures by 25, 24, and 21% for corn stover, switch grass, and poplar. A similar effect was observed for glucose percent yields as well. This temperature reduction is due to lowering of the activation energy in the polysaccharide depolymerization reaction and most likely due to hydrogen-bonding-type dipolar interactions between the isethionic acid −OH group and −OH groups in biomass polysaccharides.